Test scope	Test connection			Test condition	Nominal value	Possible cause/Remedy
1.0		Voltage supply Circuit 31	F1 22 (1)		+		11 - 14 V	Wiring.
1.1		Voltage supply Circuit 30	F1 22 (1)		F1 10 (1)		11 - 14 V	Wiring.
1.2		Voltage supply Circuit 31e (ground for electronics)	F1 5 (1)		F1 10 (1)		11 - 14 V	Wiring.
2.0		HHT serial interface (connection between N10 and test cable for diagnostics [X11/4] )	X11/4 12		N10 A3 (4)	Ignition: OFF Remove N10, disconnect connector 4 (24-pole)	5	Wiring.
3.0		CAN L/H (short circuit)	B12 (2)	N10	A12 (2)	Ignition: OFF Disconnect connector 2 from N10	Approx. 60	Wiring, > 60 , wiring -//-, 23 6.0, 23 4.0
3.1		CAN H - (short to ground)	B12 (2)			Ignition: OFF Disconnect connector 2 from N10	Approx. 60	Wiring.
3.2		CAN L - (short to ground)	A12 (2)			Ignition: OFF Disconnect connector 2 from N1	Approx. 60	Wiring.
4.0		CAN H, AAM to engine control module (N3), -//- (open circuit)	N10 B12 (2)		N3	Ignition: OFF Disconnect both control modules from CAN. See wiring diagram for socket descriptions.	< 1	Wiring.
4.1		CAN L, AAM to engine control module (N3), -//- (open circuit)	N10 A12 (2)		N3	Ignition: OFF Disconnect both control modules from CAN. See wiring diagram for socket descriptions.	< 1	Wiring.
5.0		CAN H, AAM to traction control module (N47), -//- (open circuit)	N10 B12 (2)		N47 H	Ignition: OFF Disconnect both control modules from CAN.	< 1	Wiring.
5.1		CAN L, AAM to traction control module (N47), -//- (open circuit)	N10 A12 (2)		N47 L	Ignition: OFF Disconnect both control modules from CAN.	< 1	Wiring.
6.0		CAN H, AAM to instrument cluster (A1), -//- (open circuit)	N10 B12 (2)		A1 B9	Ignition: OFF Disconnect both control modules from CAN.	< 1	Wiring.
6.1		CAN L, AAM to instrument cluster (A1), -//- (open circuit)	N10 A12 (2)		A1 B10	Ignition: OFF Disconnect both control modules from CAN.	< 1	Wiring.
7.0		CAN H, AAM to transfer case control module (N78), -//- (open circuit)	N10 B12 (2)		N78 B3	Ignition: OFF Disconnect both control modules from CAN.	< 1	Wiring.
7.1		CAN L, AAM to transfer case control module (N78), -//- (open circuit)	N10 A12 (2)		N78 B2	Ignition: OFF Disconnect both control modules from CAN.	< 1	Wiring.
8.0		CAN H, AAM to trip computer control module (N41), -//- (open circuit)	N10 B12 (2)		N41 3	Ignition: OFF Disconnect both control modules from CAN.	< 1	Wiring.
8.1		CAN L, AAM to trip computer control module (N41), -//- (open circuit)	N10 A12 (2)		N41 4	Ignition: OFF Disconnect both control modules from CAN.	< 1	Wiring.

Preparation for Windshield Wiper System Test: 1. Voltage supply to AAM is Ok. 2. Battery voltage 11 to 14 V 3. Fuses ok. 4. Ignition ON (Circuit 15). 5. Observe CAUTION! see 22/1

		Test scope	Test connection			Test condition	Nominal value	Possible cause/Remedy
1.0		Park position Contact 1	15	S4	19	Combinationswitch (S4) in OFF position.	< 1	S4
1.1		Interval wipe Contact 2	15	S4	19	Combination switch (S4) in "Interval wipe" position.	< 1	S4
1.2		Single wipe Contact	15	S4	18	Combination switch (S4) in "single wipe" position.	< 1	S4
1.3		Wipe stage 1 Contact	15	S4	18	Combination switch (S4) in "wipe stage 1" position.	< 1	S4
1.4		Wipe stage 2 Contact	17	S4	18	Combination switch (S4) in "wipe stage 2" position.	< 1	S4
1.5		Interval wipe Contact 1	16	S4	18	Combination switch (S4) in "Interval wipe" position.	< 1	S4
2.0		Wash Contact	20	S4	18	Combination switch (S4) in "wash" position.	< 1	S4
3.0		Front wiper in "Interval wipe" (HHT Actual values)				Combination switch (S4) in "interval wipe" position.		S4
3.1		Front wiper motor relay (F1k17) (Activation)				activate: "Front wiper motor relay ON".	Relay switches audibly.	3.4
3.2		Wiper motor (M6/1) Activation Switch (S4) set at "interval wipe"	30	F1k17	87	Disconnect relay (F1k17), S4 in position: "interval wipe".	Wiper motor runs.	If values OK: F1k17, If values not OK: 3.4
3.3		Wiper motor (M6/1) Activation Switch (S4) set at "OFF"	30	F1k17	87	Disconnect relay (F1k17), S4 in position: "OFF".	Wiper motor runs.	If values OK: S4, If values not OK: Wiring, S4 M6/1
3.4		Front wiper motor relay (F1k17) Activation voltage	85	F1k17	86	activate: "Front wiper motor relay ON".	11 - 14 V	If values OK: F1k1, Values not OK: Wiring, N10
4.0		Wiper motor (M6/1) Circuit 31b HHT actual values				Combination switch (S4) in position: "wipe stage 1".	, After cycling past Park position:	Wiring, Cam switch on wiper motor (M6/1).
5.0		Wiper motor (M6/1) Stage 1 Voltage supply	5	M6/1	4	Disconnect connector, Turn combination switch (S4) to position: "wipe stage 1".	11 - 14 V	Wiring.
5.1		Wiper motor (M6/1) Stage 2 Voltage supply	5	M6/1	3	Disconnect connector, Turn combination switch (S4) to position: "wipe stage 2".	11 - 14 V	Wiring.
5.2		Wiper motor (M6/1) Stage 1 Activation	M6/1 5 4		+	Disconnect connector, Turn combination switch (S4) to position: "wipe stage 1" CAUTION! See notes on 22/1 For battery connection, use safety cable 124 589 37 63 00	Wiper motor runs slowly.	Wiper motor (M6/1).
5.3		Wiper motor (M6/1) Stage 2 Activation	M6/1 5 3		+	Disconnect connector, Turn combination switch (S4) to position: "wipe stage 2" CAUTION! See notes on 22/1 For battery connection, use safety cable 124 589 37 63 00	Wiper motor runs fast.	Wiper motor (M6/1).
6.0		Windshield washer pump (M5/1) Function	+		M5/1 1 2	Disconnect connector at motor. For battery connection, use safety cable 124 589 37 63 00	Motor runs.	Windshield washer pump (M5/1).
7.0		Rear window washer pump (M5/3) Function	+		M5/3 1 2	Disconnect connector at motor. For battery connection, use safety cable 124 589 37 63 00	M5/3 runs.	Rear window washer pump (M5/3).
8.0		Tailgate window wiper motor (M6/4) Activation	30	M6/4k1	87	Ignition: ON Disconnect tailgate wiper motor relay module (M6/4k1). CAUTION! See notes on 22/1 For battery connection, use safety cable 124 589 37 63 00	Motor runs.	Tailgate window wiper motor (M6/4).
8.1		Tailgate window wiper motor (M6/4) Checking cam switch	30	M6/4k1	87a	Move motor out of park position as in step 1.0 CAUTION! See notes on 22/1 For battery connection, use safety cable 124 589 37 63 00	Motor returns to and remains in park position.	Cam switch on M6/4
9.0		Rear window wiper/washer switch (S78) in "Interval wipe" HHT Actual values				Ignition: ON Rear window wiper/washer switch (S78) in "Interval wipe" position.		If values OK: 9.1 If values are not OK: 1.2
9.1		Rear window wiper/washer switch (S78) in "wash" HHT Actual values				Ignition: ON Rear window wiper/washer switch (S78) in "wash" position.		If values OK: No fault. If values are not OK: 1.2
9.2		Rear window wiper/washer switch (S78) Voltage supply	4	S78		Ignition: ON	11 - 14 V	If values OK: Rear window wiper/washer switch (S78). If values are not OK: Wiring.
10.0		Tailgate window wiper motor (M6/4) Voltage supply	1	M6/4	2	Disconnect connector, Ignition: ON	11 - 14 V	Wiring.
10.1		Tailgate window wiper motor relay module (M6/4k1) Activation	3	M6/4 1k	2	Disconnect connector, activate: "Tailgate window wiper motor relay ON". 1k resistor hooked up parallel to multimeter.	11 - 14 V	Wiring, N10
10.2		Tailgate window wiper motor (M6/4) Activation	M6/4 1 M6/4k1 30		+	Disconnect connector at motor, Disconnect relay, CAUTION! See notes on 22/1 For battery connection use safety cable 124 589 37 63 00	Motor runs.	If values are OK: M6/4k1, If values are not OK: M6/4

Preparation for Interior Lighting Test: 1. Voltage supply to AAM is Ok. 2. Battery voltage 11 to 14 V 3. Fuses ok. 4. Interior lamps functional.

		Test scope	Test connection			Test condition	Nominal value	Possible cause/Remedy
1.0		Front dome lamp (with shut-off delay and front reading lamp) (E15/2) Automatic Activation	C	E15/2	B	Disconnect connector at E15/2, activate: "Front dome lamp (with shut-off delay and front reading lamp): ON".	11 - 14 V	Wiring, N10
2.0		Left rear dome lamp (E15/8) Automatic Activation	C	E15/8	B	actual value: "Rear dome lamps: ON".	11 - 14 V	Wiring.
2.1		Right rear dome lamp (E15/9) Automatic Activation	C	E15/9	B	actual value: "Rear dome lamps: ON".	11 - 14 V	Wiring, All Activity Module (AAM) (N10).
3.0		Rear dome lamp (E15/3) Voltage suppy	A	E15/3	B		11 - 14 V	Wiring.
3.1		Rear dome lamp (E15/3) Automatic ativation	C	E15/3	B	Tailgate closed.	11 - 14 V	Wiring.
4.0		Left front door rotary tumbler (Right front door rotary tumbler) Closed HHT Actual Values				Door closed.		If values OK: 4.1 If values not OK: 4.2
4.1		Left front door rotary tumbler (Right front door rotary tumbler) Open HHT Actual Values				Open door.		If values OK: No fault. If values not OK: 4.3
4.2		Left front door rotary tumbler (Right front door rotary tumbler) Switch disconnected HHT Actual Values				Open door, Disconnect left/right front door separation point connector (X35/1, X35/2).		If values OK: Left front door rotary tumbler microswitch (S87/7), Right front door rotary tumbler microswitch (S87/6), Wiring (- short circuit to ground). If values not OK: Wiring (- short circuit to ground), All Activity Module (AAM) (N10).
4.3		Left front door rotary tumbler (Right front door rotary tumbler) Switch bridged HHT Actual Values	2 (A)	X35/1 X35/2	1 (A)	Connection (X35/1, X35/2), see 21/5		If values OK: S876/7, S87/6, wiring -//- (open circuit). If values not OK: wiring -//- (open circuit), All Activity Module (AAM) (N10).
5.0		Rear door rotary tumbler switches closed. HHT Actual Values				Both rear doors closed.		If values OK: 5.1 If values not OK: 5.5
5.1		Left rear door rotary tumbler switch: Open HHT Actual Values				Open left rear door.		If values OK: 5.2 If values not OK: 5.3
5.2		Right rear door rotary tumbler switch: Open HHT Actual Values				Close left rear door, open right rear door.		If values OK: No fault. If values not OK: 5.4
5.3		Left rear door rotary tumbler microswitch (S87/2), Switch bridged HHT Actual Values	2 (A)	X35/3	1 (A)	Disconnect left rear door separation point (X35/3) connector.		If values OK: S87/2, Wiring -//- (open circuit). If values not OK: Wiring -//- (open circuit).
5.4		Right rear door rotary tumbler microswitch (S87/3), Switch bridged HHT Actual Values	2 (A)	X35/4	1 (A)	Disconnect right rear door separation point (X35/4) connector.		If values OK: S87/3, Wiring -//- (open circuit) If values not OK: Wiring -//- (open circuit).
5.5		Left rear door rotary tumbler microswitch (S87/2), Switch disconnected HHT Actual Values				Both rear doors closed. Left rear door separation point (X35/3) connector disconnected.		If values OK: S87/2, Wiring - short circuit to ground. If values not OK: 6.1
5.6		Right rear door rotary tumbler microswitch (S87/3), Switch disconnected HHT Actual Values				Both rear doors closed. Right rear door separation point (X35/4) connector disconnected.		If values OK: S87/3, Wiring - short circuit to ground. If values not OK: Wiring - short circuit to ground, All Activity Module (AAM) (N10).
6.0		Tailgate rotary tumbler microswitch (S88/1) Closed HHT Actual Values				Tailgate closed.		If values OK: 6.1 If values not OK: 6.2
6.1		Tailgate rotary tumbler microswitch (S88/1) Open HHT Actual Values				Tailgate open.		If values OK: No fault. If values not OK: 6.3
6.2		Tailgate rotary tumbler microswitch (S88/1) Switch disconnected HHT Actual Values				Disconnect interior/tailgate connector (X18/1). Open tailgate.		If values OK: S88/1 Wiring -//- (open circuit). If values not OK: All Activity Module (AAM) (N10), Wiring -//- (open circuit).
6.3		Tailgate rotary tumbler microswitch (S88/1) Switch bridged HHT Actual Values	2 (A)	X18/1	1 (A)			If values OK: S88/1 Wiring -//- (open circuit). If values not OK: All Activity Module (AAM) (N10), Wiring -//- (open circuit).

Preparation for Interior Lighting Test: 1. Voltage supply to AAM is Ok. 2. Battery voltage 11 to 14 V 3. Fuses ok.

		Test scope	Test connection			Test condition	Nominal value	Possible cause/Remedy
1.0		Rear window defroster relay (F1k1). Function				activate: Rear window defroster relay (F1k1): ON Activate only briefly, since battery will be heavily loaded during measurement.	Rear window defroster relay (F1k1) will close audibly.	If values OK: 1.1 If values not OK: F1k1
1.1		Heated rear window defroster element (R1) Voltage HHT Actual Values		R1		activate: Rear window defroster relay (F1k1): ON Activate only briefly, since battery will be heavily loaded during measurement.	Rear window defroster relay (F1k1) will close audibly, >8 V	If values OK: 1.2 If values not OK: 1.3
1.2		Heated rear window defroster element (R1) "Defrost" current		R1 Range: 20 Amps!		Disconnect connector at R1, activate: Rear window defroster relay (F1k1): ON Activate only briefly, since battery will be heavily loaded during measurement.	>1 A	If values OK: No fault. If values not OK: R1
1.3		Antenna splitter (A2/5) Continuity			A2/5 UB +	Disconnect connector at A2/5, activate: Rear window defroster relay (F1k1): ON	11 - 14 V	If values OK: Wiring, A2/5 If values not OK: 1.4
1.4		Rear window defroster relay (F1k1). Bridge relay	30		F1k1 12 A2/5 UB +	Disconnect connect at A2/5 Use bridge with safety cable 124 589 37 63 00	11 - 14 V	Wiring, F1k1
2.0		Heated rear window switch (S21s9) Not pressed HHT Actual Values				Heated rear window switch (S21s9) is not pressed.		If values OK: 2.1 If values not OK: S21s9, Switch (CL) (S21s10) Wiring -//- (open circuit).
2.1		Heated rear window switch (S21s9) Pressed HHT Actual Values				Heated rear window switch (S21s9) is pressed.		If values not OK: 2.2
2.2		Switch (CL) (S21s10) Pressed HHT Actual Values				Switch (CL) (S21s10) is pressed.		If values OK: Heated rear window switch (S21s9), Wiring. If values not OK: Wiring -//- (open circuit), All Activity Module (AAM) (N10).
3.0		Heated rear window indicator lamp (S21e2) Activation	30 E (3)	F1k1 S21e2	87 E (1)	Disconnect convenience relay (F1k14), activate: Rear window defroster relay (F1k1): ON	11 - 14 V	If values OK: Heated rear window indicator lamp (S21e2), Wiring. If values not OK: Wiring.